You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <protectedtitles>
      <pt ns="4" title="海外で日本食wiki:プライバシー・ポリシー" timestamp="2015-05-24T06:09:23Z" level="sysop" />
      <pt ns="4" title="海外で日本食wiki:海外の日本食wikiについて" timestamp="2015-05-24T06:09:12Z" level="sysop" />
    </protectedtitles>
  </query>
</api>